import java.util.AbstractSet;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.Set;


public class SubSet<Objcet> 
		extends AbstractSet<Object> 
		implements Set<Object>   {
	ArrayList<Object> store;
	 
	SubSet(){
		store = new ArrayList<Object>();
	}

	public int size() {
		if (store == null){
			return 0;
		}
		else
			return store.size();
	}
	public boolean add(Object e) {
		if(!contains(e) && e != null){
			store.add(e);
			return true;
		}
		return false;
	}



}
